package com.example.demo;

import org.springframework.boot.CommandLineRunner;
import org.springframework.core.env.Environment;

import java.util.Objects;

@SuppressWarnings("unused")
class CustomCommandLineRunner implements CommandLineRunner {

    Environment env;

    public CustomCommandLineRunner(Environment env){
        this.env=env;
    }

    @Override
    public void run(String... args){
        System.out.println("利用Spring Boot自动装配的CommandLineRunner.");

        System.out.println("生成一个随机字符串:".concat(Objects.requireNonNull(env.getProperty("random."))));
    }

}
